Cigarette rod machine



Patented Nov. 1, 1932 1. .hUNITED STATES PATENT OFFICE ALBERT'WERNER, OF DRESDEN, GERMANY, ASSIGNOR TO UNIVERSELLE GIGARET'I'EN- MASCHINEN-FABRIK J. C. MULLER & 00., OF DRESDEN, GERMANY CIGARETTE ROI) MACHINE Application filed September 17, 1931, Serial No. 563,431, and in Germany October 20, 1930.

g upon one another, whereupon the rod is next passed through a heated drying device to harden the adhesive. This arrangement has the disadvantagethat on the passage of the strip below the covering finger, adhesive is deposited on the underside of the finger.

The result of this is that this adhesive comes into contact with the rod and consequently the rod adheres to the covering finger and tears the papers. Efforts have been made therefore to apply the adhesive only in such a manner that any exudation of adhesive from between the two superposed flaps is avoided as far as possible. Nevertheless, this drawback cannot be obviated entirely.

It is the object of the present invention, therefore, to render harmless any excess of adhesive which issues from the place provided with adhesive, by preventing the superposed flaps which are to be stuck together from making any contact with any fixed parts of the machine, until the adhesivebearing place is completely dried. For this purpose, according to the invention, the overlapping portions are pressed together by pneumatic means, that is compressed air or a compressed gas, while simultaneously with the operation of pressing the portions together, the adhesive applied may be dried by heating the said compressed air or gas.

One constructional form of the invention is shown diagrammatically and by way of example in the accompanying drawing, wherein Figure 1 is a longitudinal section and Figure 2 is a cross section through the part under consideration of a cigarette rod machine.

In the drawing, a is the cigarette rod which is wrapped in the paper and is surrounded by the so-called form band on which the paper and tobacco are conveyed. The paper has already been provided with adhesive and the two overlapping ends of the paper have been placed one over the other so that they now have to be pressed togetherfafter which the adhesive has to be dried. The rod so prepared enters in the direction of the arrow in Figure 1 into the chamber or casing accord ing to theinvention, which comprises a lower part b and an upper part c. The upper part, at the place where the paper ends provided with adhesive lie one above the other, has a cavity (Z extending lengthwise of the chamber. The said cavity is filled with compressed air, preferably heated. The compressed air enters, for example, at one end through a passage .6. If it is intended to press together without simultaneous drying, it is sufficient to connect the passage 6 to a com-' pressed air container, when any air which escapes through leaks is always made up again from the container. If drying is to be efiected simultaneously, it is preferable to replace the heat consumed each time by supplying fresh, heated compressed air. In such a case, if the leaks alone do not suffice to allow enough compressed air to escape, an outlet passage may be provided at the other end of the chamber.

It is preferable to insert inthe passage f a throttling screw or any other throttling means g so as to be able to regulate the quantity of escaping compressed air, and hence also the degree of heating. The compressed air may be preheated in any known manner. Constructionally, of course, the arrangement may also be put into effect otherwise. Thus, the compressed air may also be heated by means of a heating element designed for the purpose inserted in the passage d.

I claim 1. An apparatus for uniting the adhesivebearing edges of the paper of a cigarette rod, comprising a support over which the rod passes and pneumatic means for pressing to- 7 getherithe edges of the paper to unite them together.

2. An apparatus for uniting the adhesivebearing edges of the paper of a cigarette rod,

rette rod passes, said casing receiving a compressed aseous medium to press together the edges ogthe paper to unite them together.

An apparatus for uniting the adhesivebearing edges of the paper of a cigarette rod, comprising a casing through which the cigarette rod passes, said casing having a cavity therein and a passage leading to the cavity, said cavity being adapted to receive comprexed and heated air through the passage to press together and dry the edges of the paper to unite them together.

5. An a paratus for uniting the adhesivebearing ges of the paper of a cigarette rod, comprising g; casing through which the cigarette rod passes, said casing having a cavity therein and a passage leading to the cavity, said cavity being ada )ted to receive compressed and heated air t rough the passage to press together and dry the edges of the paper to unite them together, said casing having an outlet passage therein in communication with the cavity for the escape of the cooled air.

6. An a paratus for uniting the. adhesivebearing e ges of the paper of a cigarette rod, comprising a casing through which the cigarette rod passes, said casing having a cavity therein and a passage leading to the cavity, said cavity being adapted to receive compressed and heated air through the passage to press together and dry the edges of the apex to unite them together, said casing havlag an outlet passage therein in communication with the cavity for the escape of the cooled air; and a throttling means in said outlet-passage to control the escape of air.

7. An apparatrs for uniting the adhesivebearing edges of the paper of a cigarette rod, comprising a casing through which the cigarette rod passes, said casing having a cavity therein and a passage leading to the cavity, said cavity being adapted to receive compressed and heated air through the passage to press together and dry the edges of-the paper to unite them together, said casing having an outlet passage therein in communication with the cavity for the escape of the cooled air, and said casing being composed nature.

of an upper part and a lower part, the cavity and passages being in the upper part.

8. An apparatus for uniting the adhesivebearing edges of the paper of a cigarette rod, comprising a casing composed of an upper part and a lower support part, the cigarette rod passing on and over the support part and said casing receiving a compressed gaseous medium through the upper part to press together the edges of the paper to unite them In testimony whereof I have afixed my sig- ALBERT WERNER. 

